This is a response to
By being declarative and deterministic, and rendered in ordinary plain text, HTML and CSS conceal no surprises, which is likely why they are not considered “real programming” by “real” programmers. This property, however, makes them especially easy to learn. Moreover, they are all you need to learn in order to achieve a great many useful results in an open Web.https://doriantaylor.com/googles-long-march
The rest of it seems reasonable to me. Any organization that was created to solve a problem at some point starts propagating a variation of the problem it was meant to solve because it has become really good at solving variations of that problem. Google, I guess, is really good at crawling so whatever advantage it can eek out for itself to make it harder for some upstart to do the same will be prioritized and pushed forward. Other organizations do the same thing in their respective domains and this is a social problem so we need to address it as a social problem instead of couching it in technical language and chasing technical solutions.
This also reminds me of a quote
“It is a mistake,” he said, “ to suppose that the public wants the environment protected or their lives saved and that they will be grateful to any idealist who will fight for such ends. What the public wants is their own individual comfort. We know that well enough from our experience in the environmental crisis of the twentieth century. Once it was well known that cigarettes increased the incidence of lung cancer, the obvious remedy was to stop smoking, but the desired remedy was a cigarette that did not cause cancer. When it became clear that the internal-combustion engine was polluting the atmosphere dangerously, the obvious remedy was to abandon such engines, and the desired remedy was to develop non-polluting engines.”― Isaac Asimov, The Gods Themselves
I think the main mistake the author is making is assuming people want an accessible web. What people want is a comfortable experience and the current set of web standards provides them enough of an experience that they are not concerned about hypothetical futures that could have been if the web was more accessible.